METHOD OF MONITORING SHORT CIRCUITS IN TORQUE MOTORS

摘要

A method of monitoring an actuator system comprising a control device, a torque motor having a voltage Umc across its terminals and actuating a servo-valve, and an actuator controlled by the servo-valve, the control device being suitable for delivering to the torque motor a control current Icmd as a function of a current setpoint I_c and of a measured current Imes, the monitoring method comprising the following steps:
comparing the voltage Umc measured across the terminals of the torque motor with a predetermined threshold voltage Vthresh; andif the voltage across the terminals of the torque motor is less than or equal to the predetermined threshold voltage, raising an alarm and indicating a failure of the servo-valve;the method being characterized in that said comparison of the voltage Umc is performed only if the control current Icmd is greater than a predetermined threshold current Iinhib, with a control current less than that inhibiting any signaling of a servo-valve failure.

主权项

1. A method of monitoring an actuator system comprising a control device (11), a torque motor (12) having a voltage Umc across its terminals and actuating a servo-valve (13), and an actuator (14) controlled by the servo-valve, the control device being suitable for delivering to the torque motor a control current Icmd as a function of a current setpoint I_c and of a measured current Imes, the monitoring method comprising the following steps:
comparing the voltage Umc measured across the terminals of the torque motor with a predetermined threshold voltage Vthresh, and if the voltage across the terminals of the torque motor is less than or equal to the predetermined threshold voltage, raising an alarm and indicating a failure of the servo-valve,wherein said comparison of the voltage Umc is performed only if the control current Icmd is greater than a predetermined threshold current Iinhib, with a control current less than that inhibiting any signaling of a servo-valve failure.